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Net Loss per Share - Computation of Diluted Net Loss Per Share in Attributable to Common Shareholders Indicate to Anti Diluted Effect (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Options to Purchase Common Shares        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share amount 4,099,545 1,920,950 4,099,545 1,920,950
Series A Preferred Shares        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share amount   11,090,135   11,090,135